CN107071893A - A kind of cellular network RTK localization methods and system - Google Patents
A kind of cellular network RTK localization methods and system Download PDFInfo
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- CN107071893A CN107071893A CN201710037601.3A CN201710037601A CN107071893A CN 107071893 A CN107071893 A CN 107071893A CN 201710037601 A CN201710037601 A CN 201710037601A CN 107071893 A CN107071893 A CN 107071893A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/43—Determining position using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry
- G01S19/44—Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0273—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves using multipath or indirect path propagation signals in position determination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0284—Relative positioning
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of cellular network RTK localization methods, including fixed reference station is chosen, standard coordinate is set, obtained observation Data Concurrent and send centralized-control center；Centralized-control center is with the reference station control centre belonging to fixed reference station；Fixed reference station calculates pseudorange residuals and carrier phase residual error and sends reference station control centre；Rover station is to itself coarse positioning and sends centralized-control center to；The affiliated reference station control centre of centralized-control center distribution rover station；Matching rover station corresponding reference station in reference station control centre simultaneously issues rover station；Rover station receives reference station data；Rover station high accuracy positioning.Present invention also offers a kind of system positioned with the localization method, including centralized-control center, some reference station control centres, fixed reference station and rover station and communication link.Locating speed of the present invention is fast, and precision is high, and cost is low, and data processing pressure is small.
Description
Technical field
Present invention relates particularly to a kind of cellular network RTK localization methods and system.
Background technology
In recent years, the application of high-precision NAVSTAR extends to Driving Test from traditional survey field, intelligence
Control, unmanned, unmanned plane, the field such as remote sensing, so as to cause the quantity of high-precision satellite navigation terminal (rover station) not
Disconnected increase.Ever-increasing high-precision satellite positioning navigation applies the need for causing high-precision technology of network RTK with positioning terminal
Ask more and more obvious.
RTK (Real Time Kinematic) technology is a kind of real time kinematic survey system based on carrier phase difference part,
It positions knot on the basis of being built upon two survey station carrier phase observed quantities of processing in real time there is provided the 3-dimensional in specified coordinate system
Really, Real-Time Positioning can reach Centimeter Level, and have the advantages that real-time is good, speed is fast.RTK general principle is to join
Station is examined with rover station while receiving satellite-signal, reference station will observe data (predominantly carrier phase, pseudorange) and reference station mark
Quasi coordinates position is transferred to rover station by Data-Link (modem, radio station or communication network), and rover station is logical using software
Difference Calculation is crossed, the observation error of rover station is reduced, the relative coordinate between rover station and reference station is calculated, according to reference station
Standard coordinate, realize precision positioning, positioning precision is up to Centimeter Level.RTK technologies are widely used in outdoor high accuracy positioning and led
The industry for correlation of navigating, for example, mapping, Driving Test, intelligent control is unmanned, unmanned plane, remote sensing etc..
The core of RTK technologies is to consider between reference station and rover station that observed data value possesses identical and is mainly three
Plant error：Atmosphere propagated error, satellite ephemeris error, the common error of star clock error and other forms, utilize the side of difference
Formula eliminates common error, and it is poor to calculate the integer ambiguity of carrier phase and real-time phase between reference station and rover station, and then
Realize high accuracy positioning.However, RTK technologies have certain limitation for the distance between reference station and rover station.Typically,
The distance between reference station and rover station are no more than 20km, referred to as short baseline RTK.If between reference station and rover station
Distance can be substantially reduced more than 20km, the then correlation for the ionospheric error that reference station and rover station reception data are present, so that
Effective RTK positioning results can not be obtained so that Real-Time Positioning is greatly lowered.For between reference station and rover station
RTK technology of the distance more than more than 20km is referred to as Long baselines RTK.The key technology of Long baselines RTK precision positionings is solved at present
For technology of network RTK.The principle of technology of network RTK is as shown in figure 1, specific as follows：Firstly, there are in a network RTK data
The heart, it generates virtual reference station (VRS-Virtual under diverse location using the observation data of multiple reference stations
Reference Station) and the dummy observation for obtaining virtual reference station is calculated, and then set up a virtual reference station and void
The list of quasi-observation, and by collecting the data of all RTK reference stations, the virtual reference of real-time update virtual reference station
Value.Secondly, rover station obtains the positioning result of precision within 10 meters by coarse positioning (pseudorange One-Point Location), and its result is given
Network RTK data centers, RTK data centers calculate position and the observation of corresponding virtual reference station according to its positioning result
Value, and send the dummy observation of corresponding virtual reference station to rover station.Finally, rover station utilizes the void of virtual reference station
Quasi-observation does difference with our station observation data, recycles conventional fast ambiguity computation to obtain rover station and virtual ginseng
The integer ambiguity for examining station is poor with real-time phase, further obtains the positioning result of Centimeter Level.
However, network RTK has some limitations.(1) firstly, it is necessary to set up a RTK data center, data center
Need to consider with the position of all RTK reference stations.It is able to ensure that between RTK data centers and reference station and rover station logical in real time
Letter, and have certain requirement to traffic rate.And in some remote districts, temporarily without mobile communications network or when communication
When speed does not reach RTK observation data transmission rates demands, technology of network RTK cannot be used.(2) secondly as network RTK
There is the solution of problem proposition mainly for Long baselines RTK in technology, therefore, and technology of network RTK can not pass through short distance electricity
The mode of platform realizes, can only be by the form of cable network, wireless cellular network or WLAN by the observation of reference station
Information is aggregated into network RTK data centers by internet, and observation data have certain transmission delay and processing is prolonged
Late, there is certain limitation for the high accuracy positioning under dynamic environment.(3) then, technology of network RTK needs to build substantial amounts of
Reference station (also referred to as CORS stations), CORS stations construction cost is high, and CORS stations need to pay substantial amounts of maintenance cost every year.
(4) finally, the virtual reference station data that RTK data centers need to maintain huge update and rover station data interaction.Also, network
The complexity and virtual reference observation of RTK technique algorithms are increased with the increase of the quantity of rover station, and then to data
Central server processing and communication network transmission bring greatly burden and pressure.
The content of the invention
An object of the present invention is to provide that a kind of locating speed is fast, positioning precision is high, with low cost, large-scale application
When the small cellular network RTK localization methods of data processing pressure.
The second object of the present invention be to provide it is a kind of apply that the cellular network RTK localization methods are positioned be
System.
This cellular network RTK localization methods that the present invention is provided, comprise the following steps：
S1. fixed reference station is chosen, the High-precision standard coordinate position of fixed reference station itself is set；
S2. step S1 choose fixed reference station real-time monitored and obtain the observation data needed for RTK technologies；
S3. fixed reference station sends the standard coordinate position of itself to centralized-control center；
S4. centralized-control center distributes fixed reference according to the standard coordinate position of the step S3 fixed reference stations obtained
Reference station control centre belonging to standing；
S5. fixed reference station is residual according to the pseudorange residuals and carrier phase that the step S2 observation data obtained calculate itself
Difference；
S6. the standard that pseudorange residuals, carrier phase residual error and the step S1 that fixed reference station obtains step S5 are set
Coordinate position is sent to affiliated reference station control centre；
S7. rover station is calculated by Pseudo-range Observations and obtains itself current coarse positioning result；
S8. rover station sends the obtained coarse positioning results of step S7 to centralized-control center；
S9. reference of the centralized-control center according to belonging to the coarse positioning result of the step S8 rover stations obtained distributes rover station
Stand control centre；
S10. pseudorange residuals of the reference station control centre according to reference station, carrier phase residual sum standard coordinate position, with
And the coarse positioning position result of rover station matches the reference station corresponding to rover station；
S11. the reference station unique mark that rover station is matched in reference station control centre is (in a communication network to be unique
IP address or MAC Address) it is sent to rover station；
S12. rover station receives the observation data and standard coordinate of correspondence reference station according to the unique mark of correspondence reference station
Position；
S13. rover station completes rover station according to the observation data and the observation data of itself of the corresponding reference station received
High accuracy positioning.
The reference station corresponding to rover station described in step S10 includes fixed reference station and instant reference station.
The described localization method based on RTK and reference station also comprises the following steps：
S14. the result of the Carrier Phase Ambiguity Resolution in rover station acquisition setting time, pseudorange residuals and carrier phase are residual
Difference, and combine and judge whether itself can turn into instant reference station：If judging successfully, rover station is converted to instant reference station；
S15. instant reference station obtains result, pseudorange residuals and the carrier phase of the Carrier Phase Ambiguity Resolution in certain time
Residual error, and combine and judge whether this instant reference station can continue to turn into instant reference station：If judgement is unsuccessful, this reference immediately
Station converts back rover station.
Rover station described in step S14 judges whether itself can turn into instant reference station, specially using following rule
Judged：
If the continuous n times Carrier Phase Ambiguity Resolution success of rover station, and the pseudorange residuals value resolved every time is not more than 2 meters,
And carrier phase residual values are not more than 2 centimetres, then mobile station mode can turn into instant reference station.
Judge whether instant reference station can continue to turn into instant reference station described in step S15, if being specially reference immediately
Station has that continuous N time Carrier Phase Ambiguity Resolution is unsuccessful, then instant reference station is converted to rover station.
Described cellular network RTK localization methods also comprise the following steps：
S16. centralized-control center receives the coarse positioning positioning of rover station, judges rover station position and the ginseng belonging to it
Relation between the management region of Kao Zhan control centres, and update the rover station set belonging to reference station control centre；
S17. reference station control centre updates the unpaired message of reference station and rover station.
The rover station set updated belonging to reference station control centre described in step S16, is specially entered using following steps
Row updates：
A. reference station control centre receives the coarse positioning information of rover station, and reports centralized-control center；
B. centralized-control center according to rover station position and its belonging to reference station control centre management region it
Between relation, using the rover station set belonging to following Policy Updates reference station control centre：
If rover station gets over area and is switched to the management region of other reference station control centres, update belonging to rover station
Reference station control centre information, and by fresh information send to rover station and update before and after reference station control centre；
C. the ginseng deleted after rover station information, and renewal is concentrated from the rover station of subordinate in the reference station control centre before updating
Rover station information is added to the rover station collection of itself subordinate by Kao Zhan control centres.
Reference station control centre described in step S17 updates the unpaired message of reference station and rover station, specially using such as
One of lower two ways is updated：
The request of mode A- rover stations updates：When rover station can not be consolidated under the current reference station environment matched
Determine calculation result, then rover station request reference station control centre carries out reference station renewal；
The mode B- set times update：In the fixed time period being previously set, the fixed time period timing is reached
The unpaired message of reference station and rover station is then updated immediately；The fixed time period is to be set according to the dynamic of environment
Put, or be configured according to user behavior analysis.
The selection of fixed reference station described in step S1, is specially to set fixed reference in the place of known exact position
Stand, or fixed reference station is set at an arbitrary position, and pass through the exact position of location algorithm acquisition fixed reference station.
The described exact position that fixed reference station is obtained by location algorithm, specifically by PPP Static Precise Point Positionings
Algorithm obtains the exact position of fixed reference station for a long time.
Calculating pseudorange residuals and carrier phase residual error described in step S5, are specially calculated using following formula：
In formula
Wherein, Δ ρcFor pseudorange residuals, Δ ρfFor carrier phase residual error, the pseudorange on every t frequency of i-th satellite is seen
Single-point coarse positioning result and precision positioning result corresponding to measured value and carrier phase observation data are respectively
WithThe exact position of website is (Xf,Yf,Zf), the position of i-th satellite is (Xi,Yi,Zi)。
The reference station control centre belonging to centralized-control center distribution rover station described in step S9, specially using nearby
That nearest reference station control centre of distribution principle, i.e. centralized-control center chosen distance rover station is the ginseng that rover station belongs to
Kao Zhan control centres.
The reference station corresponding to reference station control centre matching rover station described in step S10, specially using following rule
Then matched：
The reference station h that rover station is matchedjForArgmin () is to take maximum place in formula
Index, γ={ h=1 ..., 3, Δ Dj,h＜ SD }；Wherein
The precision positions of h-th of reference station arePseudorange residuals and carrier phase residual error areWithJth
The coarse positioning position of individual rover station isSD value is relevant with short baseline RTK precision, and SD values are got over
It is big then RTK positioning precisions are smaller.
Present invention also offers a kind of system for applying the cellular network RTK localization methods to be positioned, including one
Centralized-control center, several RTK cellular cells and centralized-control center and RTK cellular cells carry out the communication of data interaction
Link；One RTK cellular cells include a reference station control centre, several fixed reference stations and several flowings
Stand, and the communication link of data exchange is carried out between reference station control centre, fixed reference station and rover station；It is described to concentrate control
Center processed is used to receive the positional information of fixed reference station, judges rover station and the position relationship of reference station control centre, distribution
Reference station control centre and renewal rover station and the data message of reference station control centre belonging to rover station；Reference station is dispatched
Center is used to match the reference station information corresponding to rover station, and the match information is sent into rover station by communication link；
Rover station is to need to carry out pinpoint rover station；Fixed reference station is used for the exact position for obtaining itself position, meter
Calculate the pseudorange residuals and carrier phase residual error of itself and send reference station control centre, be additionally operable to be matched and determined with rover station
The position at bit flow station；Reference station corresponding to the rover station includes fixed reference station and instant reference station, the instant ginseng
Station is examined to be converted by the rover station after high accuracy positioning.
This cellular network RTK localization methods and system that the present invention is provided, can switching at runtime based on rover station/reference station
Pattern, position and observation data using large-scale rover station/reference station, and specific reference station dispatching algorithm are
Each rover station provides multiple specific reference stations and matched, so as to realize the high accuracy positioning of rover station；The present invention needs
One centralized-control center and multiple reference station control centres, the reference station that centralized-control center is used to distribute belonging to rover station are adjusted
Degree center, and the effect of reference station control centre is to perform reference station dispatching algorithm, convection current according to the coarse positioning result of rover station
Dynamic station realizes that reference station is distributed, and its reference station distributed is belonging to this reference station control centre, and each reference station belongs to one
Individual reference station control centre, when certain change occurs for the position of reference station, can cause affiliated reference station control centre also to be sent out
It is raw to change；Matched completing the reference station to rover station, reference station sends data to all rover stations of pairing, so as to rover station
Realize high accuracy positioning.One rover station is only matched with a reference station.Finally, each rover station completes high accuracy positioning
Afterwards, by certain decision rule, candidate reference station can be turned into so that other rover stations make reference；The present invention need not
Carry out the CORS station networkings of large-scale centralization, it is not required that powerful and complicated RTK data centers, it is possible to use existing
Some wireless cellular network frameworks, each mobile communication base station is used as reference station control centre, it is only necessary to increase a control
Center, composition cellular network RTK basic framework；At the same time, it is more using the high accuracy positioning terminal of the invention provided, net
The robustness of network is stronger, can efficiently solve the key issue that the technology of network RTK based on virtual reference station is present, have very much
The large-scale application navigated beneficial to high accuracy positioning.
Brief description of the drawings
Fig. 1 is the positioning principle schematic diagram of existing technology of network RTK.
Fig. 2 is alignment system operating diagram of the invention.
Fig. 3 is flow chart of the method for the present invention.
Embodiment
It is illustrated in figure 2 the alignment system operating diagram of the present invention：This application Cellular Networks that the present invention is provided
The alignment system that network RTK localization methods are positioned, including centralized-control center, several RTK cellular cells and collection
Middle control centre carries out the communication link of data interaction with RTK cellular cells；One RTK cellular cells include a reference
Stand control centre, several fixed reference stations and several rover stations, and reference station control centre, fixed reference station and flowing
The communication link of data exchange is carried out between standing；The centralized-control center is used to receive the positional information of fixed reference station, sentenced
Reference station control centre and renewal belonging to disconnected rover station and the position relationship of reference station control centre, distribution rover station are flowed
The data message stood with reference station control centre；Reference station control centre is used to match the reference station information corresponding to rover station,
And the match information is sent into rover station by communication link；Rover station is to need to carry out pinpoint rover station；It is fixed
Reference station is used for the exact position for obtaining itself position, calculates the pseudorange residuals and carrier phase residual error of itself and sends ginseng
Kao Zhan control centres, are additionally operable to be matched and positioned with rover station the position of rover station；Reference corresponding to the rover station
Stand including fixed reference station and instant reference station, the instant reference station is converted by the rover station after high accuracy positioning.
It is illustrated in figure 3 flow chart of the method for the present invention：This cellular network RTK localization methods that the present invention is provided, bag
Include following steps：
S1. fixed reference station is chosen, the High-precision standard coordinate position of fixed reference station itself is set；In specific implementation
When, fixed reference station can set fixed reference station in the place of known exact position, or set fixed ginseng at an arbitrary position
Station is examined, and passes through the exact position of PPP Static Precise Point Positionings algorithm long-time acquisition fixed reference station；
S2. step S1 choose fixed reference station real-time monitored and obtain the observation data needed for RTK technologies；
S3. fixed reference station sends the standard coordinate position of itself to centralized-control center；
S4. centralized-control center distributes fixed reference according to the standard coordinate position of the step S3 fixed reference stations obtained
Reference station control centre belonging to standing；
S5. fixed reference station is residual according to the pseudorange residuals and carrier phase that the step S2 observation data obtained calculate itself
Difference, is specially calculated using following formula：
In formula
Wherein, Δ ρcFor pseudorange residuals, Δ ρfFor carrier phase residual error, the pseudorange on every t frequency of i-th satellite is seen
Single-point coarse positioning result and precision positioning result corresponding to measured value and carrier phase observation data are respectively
WithThe exact position of website is (Xf,Yf,Zf), the position of i-th satellite is (Xi,Yi,Zi)；
S6. the standard that pseudorange residuals, carrier phase residual error and the step S1 that fixed reference station obtains step S5 are set
Coordinate position is sent to affiliated reference station control centre；
S7. rover station is calculated by Pseudo-range Observations and obtains itself current coarse positioning result；
S8. rover station sends the obtained coarse positioning results of step S7 to centralized-control center；
S9. reference of the centralized-control center according to belonging to the coarse positioning result of the step S8 rover stations obtained distributes rover station
Stand control centre；In the specific implementation, can be using distribution principle, i.e. centralized-control center chosen distance rover station are nearest nearby
That reference station control centre be rover station belong to reference station control centre；
S10. pseudorange residuals of the reference station control centre according to reference station, carrier phase residual sum standard coordinate position, with
And the coarse positioning position result of rover station match corresponding to rover station reference station (including fixed reference station and immediately reference
Stand), specially matched using following rule：
The reference station h that rover station is matchedjForArgmin () is to take maximum place in formula
Index, γ={ h=1 ..., 3, Δ Dj,h＜ SD }；Wherein
The precision positions of h-th of reference station arePseudorange residuals and carrier phase residual error areWithJth
The coarse positioning position of individual rover station isWherein SD value determines short baseline RTK precision, SD values
Conference is crossed so that RTK positioning precisions decline or even cannot get calculation result, SD values are too small can cause to be not present with it is current
The reference station of rover station pairing；It is specific in real time when can using such a way choose SD value：SD is set to first
5km, if finding there is reference station, matches, if not finding the reference station that can be matched, then SD is increased into 5km, until finding have
Untill the reference station of pairing, wherein SD is at most added to 20km；
S11. the reference station unique mark that rover station is matched is sent to rover station by reference station control centre；
S12. rover station receives the observation data and standard coordinate of correspondence reference station according to the unique mark of correspondence reference station
Position；
S13. rover station completes rover station according to the observation data and the observation data of itself of the corresponding reference station received
High accuracy positioning；
S14. the result of the Carrier Phase Ambiguity Resolution in rover station acquisition setting time, pseudorange residuals and carrier phase are residual
Difference, and combine and judge whether itself can turn into instant reference station：If judging successfully, rover station is converted to instant reference station,
Specially judged using following rule：
If the continuous n times Carrier Phase Ambiguity Resolution success of rover station, and the pseudorange residuals value resolved every time is not more than 2 meters,
And carrier phase residual values are not more than 2 centimetres, then mobile station mode can turn into instant reference station.Wherein, N can use arbitrary integer
Value.N values are too small, easily cause the false-alarm erroneous judgement of instant reference station, and then cause error accumulation so that change instant reference station institute
The rover station of pairing all produces Wrong localization, and that mistake is caused to whole RTK networks spreads formula diffusion.N values are excessive, easily make
Reference station can be turned into only a few rover station so that the instant reference station that can be used in RTK networks is very few.Therefore, N value
There are different selection modes according to different scenes.For example, in unmanned plane, it is necessary to which sub_meter position is smart under unmanned environment
Spend under environment, N values can be 100-200 or so, it is assumed that the renewal frequency of 1 second, then rover station needs as instant reference station
By the time decision of 2-3 minutes., it is necessary to which centimeter-level positioning precision, N value can be 1000-3000 under mapping environment
Left and right, it is assumed that the renewal frequency of 1 second, then rover station, which turns into instant reference station, needs the time decision by 20-60 minutes or so；
S15. instant reference station obtains result, pseudorange residuals and the carrier phase of the Carrier Phase Ambiguity Resolution in certain time
Residual error, and combine and judge whether this instant reference station can continue to turn into instant reference station：If judgement is unsuccessful, this reference immediately
Station converts back rover station, if being specially that instant reference station has continuous N time Carrier Phase Ambiguity Resolution unsuccessful, instant reference station turn
It is changed to rover station；
S16. centralized-control center receives the coarse positioning positioning of rover station, judges rover station position and the ginseng belonging to it
Relation between the management region of Kao Zhan control centres, and the rover station set belonging to reference station control centre is updated, it is specially
It is updated using following steps：
A. reference station control centre receives the coarse positioning information of rover station, and reports centralized-control center；
B. centralized-control center according to rover station position and its belonging to reference station control centre management region it
Between relation, using the rover station set belonging to following Policy Updates reference station control centre：
If rover station gets over area and is switched to the management region of other reference station control centres, update belonging to rover station
Reference station control centre information, and by fresh information send to rover station and update before and after reference station control centre；
C. the ginseng deleted after rover station information, and renewal is concentrated from the rover station of subordinate in the reference station control centre before updating
Rover station information is added to the rover station collection of itself subordinate by Kao Zhan control centres；
S17. reference station control centre updates the unpaired message of reference station and rover station, specially using the following two kinds mode
One of be updated：
The request of mode A- rover stations updates：When rover station can not be consolidated under the current reference station environment matched
Determine calculation result, then rover station request reference station control centre carries out reference station renewal；
The mode B- set times update：In the fixed time period being previously set, the fixed time period timing is reached
The unpaired message of reference station and rover station is then updated immediately；The fixed time period is to be set according to the dynamic of environment
Put, or be configured according to user behavior analysis.
Claims (12)
1. a kind of cellular network RTK localization methods, comprise the following steps：
S1. fixed reference station is chosen, the High-precision standard coordinate position of fixed reference station itself is set；
S2. step S1 choose fixed reference station real-time monitored and obtain the observation data needed for RTK technologies；
S3. fixed reference station sends the standard coordinate position of itself to centralized-control center；
S4. centralized-control center is according to the standard coordinate position of the step S3 fixed reference stations obtained, distribution fixed reference station institute
The reference station control centre of category；
S5. fixed reference station calculates the pseudorange residuals and carrier phase residual error of itself according to the step S2 observation data obtained；
S6. the standard coordinate that pseudorange residuals, carrier phase residual error and the step S1 that fixed reference station obtains step S5 are set
Position is sent to affiliated reference station control centre；
S7. rover station is calculated by Pseudo-range Observations and obtains itself current coarse positioning result；
S8. rover station sends the obtained coarse positioning results of step S7 to centralized-control center；
S9. reference station of the centralized-control center according to belonging to the coarse positioning result of the step S8 rover stations obtained distributes rover station is adjusted
Degree center；
S10. pseudorange residuals of the reference station control centre according to reference station, carrier phase residual sum standard coordinate position, Yi Jiliu
The coarse positioning position result at dynamic station matches the reference station corresponding to rover station；
S11. the reference station unique mark that rover station is matched is sent to rover station by reference station control centre；
S12. rover station receives observation data and the standard coordinate position of correspondence reference station according to the unique mark of correspondence reference station
Put；
S13. rover station completes the height of rover station according to the observation data and the observation data of itself of the corresponding reference station received
Precision is positioned.
2. cellular network RTK localization methods according to claim 1, it is characterised in that the rover station institute described in step S10
Corresponding reference station includes fixed reference station and instant reference station.
3. cellular network RTK localization methods according to claim 2, it is characterised in that described based on RTK and reference station
Localization method also comprise the following steps：
S14. rover station obtains result, pseudorange residuals and the carrier phase residual error of the Carrier Phase Ambiguity Resolution in setting time, and
Joint judges whether itself can turn into instant reference station：If judging successfully, rover station is converted to instant reference station；
S15. the result of the Carrier Phase Ambiguity Resolution in instant reference station acquisition certain time, pseudorange residuals and carrier phase are residual
Difference, and combine and judge whether this instant reference station can continue to turn into instant reference station：If judgement is unsuccessful, this instant reference station
Convert back rover station.
4. cellular network RTK localization methods according to claim 3, it is characterised in that the rover station described in step S14 is sentenced
Whether itself can turn into instant reference station, specially judged using following rule if breaking：
If the continuous n times Carrier Phase Ambiguity Resolution success of rover station, and the pseudorange residuals value resolved every time is not more than 2 meters, and carry
Wave phase residual values are not more than 2 centimetres, then mobile station mode can turn into instant reference station.
5. cellular network RTK localization methods according to claim 3, it is characterised in that the judgement described in step S15 is instant
Whether reference station can continue to turn into instant reference station, if be specially immediately reference station have continuous N time Carrier Phase Ambiguity Resolution not into
Work(, then instant reference station be converted to rover station.
6. cellular network RTK localization methods according to claim 2, it is characterised in that described cellular network RTK positioning
Method also comprises the following steps：
S16. centralized-control center receives the coarse positioning positioning of rover station, judges rover station position and the reference station belonging to it
Relation between the management region of control centre, and update the rover station set belonging to reference station control centre；
S17. reference station control centre updates the unpaired message of reference station and rover station.
7. cellular network RTK localization methods according to claim 6, it is characterised in that the renewal reference described in step S16
The rover station set stood belonging to control centre, is specially updated using following steps：
A. reference station control centre receives the coarse positioning information of rover station, and reports centralized-control center；
B. between the management region of reference station control centre of the centralized-control center according to rover station position and belonging to it
Relation, using the rover station set belonging to following Policy Updates reference station control centre：
If rover station gets over area and is switched to the management region of other reference station control centres, the ginseng belonging to rover station is updated
Kao Zhan control centres information, and fresh information is sent to the reference station control centre before and after rover station and renewal；
C. the reference station deleted after rover station information, and renewal is concentrated from the rover station of subordinate in the reference station control centre before updating
Rover station information is added to the rover station collection of itself subordinate by control centre.
8. cellular network RTK localization methods according to claim 6, it is characterised in that the reference station described in step S17 is adjusted
Degree center updates the unpaired message of reference station and rover station, is specially updated using one of the following two kinds mode：
The request of mode A- rover stations updates：When rover station can not be fixed solution under the current reference station environment matched
Result is calculated, then rover station request reference station control centre carries out reference station renewal；
The mode B- set times update：In the fixed time period being previously set, the fixed time period timing is reached and then stood
Update the unpaired message of reference station and rover station；The fixed time period is to be configured according to the dynamic of environment, or
It is configured according to user behavior analysis.
9. the cellular network RTK localization methods according to one of claim 1~8, it is characterised in that consolidating described in step S1
Determine the selection of reference station, be specially that fixed reference station is set in the place of known exact position, or set at an arbitrary position solid
Determine reference station, and pass through the exact position of PPP Static Precise Point Positionings algorithm long-time acquisition fixed reference station.
10. the cellular network RTK localization methods according to one of claim 1~8, it is characterised in that the meter described in step S5
Pseudorange residuals and carrier phase residual error are calculated, is specially calculated using following formula：
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Wherein, Δ ρcFor pseudorange residuals, Δ ρfFor carrier phase residual error, the Pseudo-range Observations on every t frequency of i-th satellite
It is respectively with the single-point coarse positioning result and precision positioning result corresponding to carrier phase observation dataWithThe exact position of website is (Xf,Yf,Zf), the position of i-th satellite is (Xi,Yi,Zi)。
11. the cellular network RTK localization methods according to one of claim 1~8, it is characterised in that the collection described in step S9
Reference station control centre belonging to middle control centre's distribution rover station, specially using in distribution principle nearby, i.e. centralized Control
That nearest reference station control centre of heart chosen distance rover station is the reference station control centre that rover station belongs to；And step
The reference station corresponding to reference station control centre matching rover station described in S10, is specially matched using following rule：
The reference station h that rover station is matchedjForArgmin () is where taking maximum in formula
Index, γ={ h=1 ..., 3, Δ Dj,h＜ SD }；Wherein
The precision positions of h-th of reference station arePseudorange residuals and carrier phase residual error areWithJth
The coarse positioning position of individual rover station isSD value is relevant with short baseline RTK precision, and SD values are got over
It is big then RTK positioning precisions are smaller.
12. the system that the cellular network RTK localization methods described in a kind of use claim 1~11 are positioned, its feature exists
In including a centralized-control center, several RTK cellular cells and centralized-control center and RTK cellular cells progress data
Interactive communication link；One RTK cellular cells include reference station control centre, if several fixed reference stations and
Dry rover station, and the communication link of data exchange is carried out between reference station control centre, fixed reference station and rover station；Institute
Stating centralized-control center is used to receive the positional information of fixed reference station, judges rover station and the position pass of reference station control centre
Reference station control centre and renewal rover station and the data message of reference station control centre belonging to system, distribution rover station；Ginseng
Kao Zhan control centres are used to match the reference station information corresponding to rover station, and the match information is sent by communication link
Rover station；Rover station is to need to carry out pinpoint rover station；Fixed reference station is used to obtain the accurate of itself position
Position, calculates the pseudorange residuals and carrier phase residual error of itself and sends reference station control centre, is additionally operable to carry out with rover station
Matching and the position of positioning rover station；Reference station corresponding to the rover station includes fixed reference station and instant reference station, institute
Instant reference station is stated to be converted by the rover station after high accuracy positioning.
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